I cannot start a virtual devices on android SDK when I press the start button on AVD manager, this error shows on my screen:
Starting emulator for AVD \'AVD
For me the Environment variable was missing altogether. adding "ANDROID_AVD_HOME" as environment variable solved it. also a tip, enter the path without the "/.android/avd" part, as the application automatically adds this to it's search you don't need to specify them anymore. e.g. Env. Variable : ANDROID_AVD_HOME Value : C:\users\%USERNAME%\Androidapps
Android studio will for emulators under C:\users\%USERNAME%\Androidapps.android\avd